What was found in Baytown's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 815 µg/L 20% of the EPA limit 4000 µg/L Highest in the city: O ACES MHP · 72 people · 2019 | 3/5 | SYR4 |
| Copper | 695 µg/L 53% of the EPA limit 1300 µg/L Main supplier: CITY OF BAYTOWN · 86,004 people · 2018 | 5/5 | SYR4 |
| Nitrate | 680 µg/L 6.8% of the EPA limit 10000 µg/L Highest in the city: BAYTOWN AREA WATER AUTHORITY · 0 people · 2019 | 3/5 | SYR4 |
| Cyanide | 106 µg/L 53% of the EPA limit 200 µg/L Highest in the city: BAYTOWN AREA WATER AUTHORITY · 0 people · 2019 | 1/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 60.99 µg/L 102% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: CITY OF BAYTOWN · 86,004 people · 2019 | 5/5 | SYR4 |
| TTHM | 60.88 µg/L 76% of the EPA limit 80 µg/L Main supplier: CITY OF BAYTOWN · 86,004 people · 2019 | 5/5 | SYR4 |
| Barium | 58.15 µg/L 2.9% of the EPA limit 2000 µg/L Highest in the city: BAYTOWN AREA WATER AUTHORITY · 0 people · 2019 | 3/5 | SYR4 |
| Chloroform | 44.7 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019 | 5/5 | SYR4 |
| Dichloroacetic Acid | 39.21 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019 | 5/5 | SYR4 |
| Nitrate-Nitrite | 20 µg/L 0.2% of the EPA limit 10000 µg/L Highest in the city: O ACES MHP · 72 people · 2015 | 2/5 | SYR4 |
| Monochloroacetic Acid | 5.75 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019
Highest in the city: 19.78 µg/L — BAYTOWN AREA WATER AUTHORITY · 0 people · 2019 | 3/5 | SYR4 |
| Lead | 12 µg/L 80% of the EPA limit 15 µg/L Main supplier: CITY OF BAYTOWN · 86,004 people · 2018
Highest in the city: 18.5 µg/L — HARRIS COUNTY FWSD 27 · 2,190 people · 2017 | 4/5 | SYR4 |
| Bromodichloromethane | 17.33 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019
Highest in the city: 17.85 µg/L — HARRIS COUNTY FWSD 27 · 2,190 people · 2019 | 5/5 | SYR4 |
| Trichloroacetic Acid | 16.37 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019 | 5/5 | SYR4 |
| Lithium | 13.8 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2024 | 1/5 | UCMR-5 |
| Dibromochloromethane | 7.13 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019
Highest in the city: 10.61 µg/L — O ACES MHP · 72 people · 2019 | 5/5 | SYR4 |
| Gross Beta Particle Activity | 5.2 pCi/L No EPA limit set Highest in the city: BAYTOWN AREA WATER AUTHORITY · 0 people · 2015 | 1/5 | SYR4 |
| Dibromoacetic Acid | 4.015 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019 | 5/5 | SYR4 |
| Bromoform | 2.1 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019
Highest in the city: 3.35 µg/L — BARKALOO HOMEOWNERS ASSOCIATION · 42 people · 2019 | 5/5 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Highest in the city: BAYTOWN AREA WATER AUTHORITY · 0 people · 2015 | 3/5 | SYR4 |
| Monobromoacetic Acid | 1.4 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2019 | 1/5 | SYR4 |
| Atrazine | 0.2800 µg/L 9.3% of the EPA limit 3 µg/L Highest in the city: BAYTOWN AREA WATER AUTHORITY · 0 people · 2019 | 1/5 | SYR4 |
| Simazine | 0.1250 µg/L 3.1% of the EPA limit 4 µg/L Highest in the city: BAYTOWN AREA WATER AUTHORITY · 0 people · 2019 | 1/5 | SYR4 |
| Pfba | 0.0146 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2024 | 1/5 | UCMR-5 |
| Pfpea | 0.0102 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2024 | 1/5 | UCMR-5 |
| Pfhxa | 0.0098 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2024 | 1/5 | UCMR-5 |
| PFOS | 0.0060 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2024 | 1/5 | UCMR-5 |
| PFBS | 0.0057 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2024 | 1/5 | UCMR-5 |
| PFHXS | 0.0051 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2024 | 1/5 | UCMR-5 |
| Pfhpa | 0.0037 µg/L No EPA limit set Main supplier: CITY OF BAYTOWN · 86,004 people · 2024 | 1/5 | UCMR-5 |
| Lead | 0.0021 mg/L 14% of the EPA limit 0.0150 mg/L Main supplier: CITY OF BAYTOWN · 86,004 people · 2025 | 4/5 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Baytown
| Supplier | Population served |
|---|---|
| CITY OF BAYTOWN | 86,004 |
| HARRIS COUNTY FWSD 27 | 2,190 |
| O ACES MHP | 72 |
| BARKALOO HOMEOWNERS ASSOCIATION | 42 |
| BAYTOWN AREA WATER AUTHORITY | 0 |
Frequently asked questions about Baytown tap water
Is Baytown tap water safe to drink?
EPA testing detected 31 contaminants in the water serving Baytown. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Baytown?
5 public water suppliers report drinking-water monitoring for Baytown, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Baytown's water?
The contaminants EPA monitoring detected in Baytown include Fluoride, Copper, Nitrate, Cyanide, Total Haloacetic Acids (HAA5). The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.